Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
Model details →Anthropic: Claude Opus 4.8 (batch) vs OpenAI: GPT-5.3 Chat
Anthropic: Claude Opus 4.8 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Opus 4.8 (batch) | OpenAI: GPT-5.3 Chat | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 128K | 🏆 Anthropic: Claude Opus 4.8 (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.50 | $1.75 | 🏆 OpenAI: GPT-5.3 Chat |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.50 | $14.00 | 🏆 Anthropic: Claude Opus 4.8 (batch) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 Anthropic: Claude Opus 4.8 (batch) |
Frequently asked questions
Is Anthropic: Claude Opus 4.8 (batch) better than OpenAI: GPT-5.3 Chat?
Anthropic: Claude Opus 4.8 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Opus 4.8 (batch) and OpenAI: GPT-5.3 Chat?
Input: $2.50 vs $1.75 per 1M tokens. Output: $12.50 vs $14.00 per 1M tokens.
What context windows do Anthropic: Claude Opus 4.8 (batch) and OpenAI: GPT-5.3 Chat support?
Anthropic: Claude Opus 4.8 (batch) supports up to 1M tokens. OpenAI: GPT-5.3 Chat supports up to 128K tokens.
Do both Anthropic: Claude Opus 4.8 (batch) and OpenAI: GPT-5.3 Chat support tool calling?
Anthropic: Claude Opus 4.8 (batch): yes. OpenAI: GPT-5.3 Chat: yes.
Compare Anthropic: Claude Opus 4.8 (batch) with other models
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